#!/usr/bin/env python
# -*- coding: UTF-8 -*-

# change those symbols to whatever you prefer
symbols = {'ahead of': '↑', 'behind': '↓', 'staged':'♦', 'changed':'‣', 'untracked':'…', 'clean':'⚡', 'unmerged':'≠', 'sha1':':'}

from subprocess import Popen, PIPE

output,error = Popen(['git','status'], stdout=PIPE, stderr=PIPE).communicate()

if error:
	import sys
	sys.exit(0)
lines = output.splitlines()

import re
behead_re = re.compile(r"^# Your branch is (ahead of|behind) '(.*)' by (\d+) commit")
diverge_re = re.compile(r"^# and have (\d+) and (\d+) different")

status = ''
staged = re.compile(r'^# Changes to be committed:$', re.MULTILINE)
changed = re.compile(r'^# Changed but not updated:$', re.MULTILINE)
untracked = re.compile(r'^# Untracked files:$', re.MULTILINE)
unmerged = re.compile(r'^# Unmerged paths:$', re.MULTILINE)

def execute(*command):
	out, err = Popen(stdout=PIPE, stderr=PIPE, *command).communicate()
	if not err:
		nb = len(out.splitlines())
	else:
		nb = '?'
	return nb

if staged.search(output):
	nb = execute(['git','diff','--staged','--name-only','--diff-filter=ACDMRT'])
	status += '%s%s' % (symbols['staged'], nb)
if unmerged.search(output):
	nb = execute(['git','diff', '--staged','--name-only', '--diff-filter=U'])
	status += '%s%s' % (symbols['unmerged'], nb)
if changed.search(output):
	nb = execute(['git','diff','--name-only', '--diff-filter=ACDMRT'])
	status += '%s%s' % (symbols['changed'], nb)
if untracked.search(output):
## 		nb = len(Popen(['git','ls-files','--others','--exclude-standard'],stdout=PIPE).communicate()[0].splitlines())
## 		status += "%s" % (symbols['untracked']*(nb//3 + 1), )
	status += symbols['untracked']
if status == '':
	status = symbols['clean']

remote = ''

bline = lines[0]
if bline.find('Not currently on any branch') != -1:
	branch = symbols['sha1']+ Popen(['git','rev-parse','--short','HEAD'], stdout=PIPE).communicate()[0][:-1]
else:
	branch = bline.split(' ')[3]
	bstatusline = lines[1]
	match = behead_re.match(bstatusline)
	if match:
		remote = symbols[match.groups()[0]]
		remote += match.groups()[2]
	elif lines[2:]:
		div_match = diverge_re.match(lines[2])
	 	if div_match:
			remote = "{behind}{1}{ahead of}{0}".format(*div_match.groups(), **symbols)

print '\n'.join([branch,remote,status])

